In Sardinia abundant granite by-products stockpiles deriving from the processing of ornamental granite quarries is becoming an environmental and economic issue. According to the last survey each year hundreds of thousands of cubic meters of granite by-products are currently discharged. This paper reports about an on going research focused on the evaluation of possible recycle techniques of such materials for road construction purposes using locally available resources. The main goal is to limit the exploitation of natural aggregates normally used in road construction industry, thus contributing to reduction of both energy and environmental loss. Potential applications of granite by-products in road layers were verified from a physical and mechanical point of view. In particular, South African technical procedures for the realization of ultra compacted base layers known as G1 were studied and reproduced with the benefit of reducing the thickness of the surfacing layers. Preliminary results have shown that granite aggregates are non plastic and with good wearing resistant thus can be safely used for road base and sub-base layers. Still more studies are need in order to reach South African specification
Re-Use of Granite by-products for road construction
Rombi J;CONTU, ALESSIO;ETZI, ANDREINA;
2013-01-01
Abstract
In Sardinia abundant granite by-products stockpiles deriving from the processing of ornamental granite quarries is becoming an environmental and economic issue. According to the last survey each year hundreds of thousands of cubic meters of granite by-products are currently discharged. This paper reports about an on going research focused on the evaluation of possible recycle techniques of such materials for road construction purposes using locally available resources. The main goal is to limit the exploitation of natural aggregates normally used in road construction industry, thus contributing to reduction of both energy and environmental loss. Potential applications of granite by-products in road layers were verified from a physical and mechanical point of view. In particular, South African technical procedures for the realization of ultra compacted base layers known as G1 were studied and reproduced with the benefit of reducing the thickness of the surfacing layers. Preliminary results have shown that granite aggregates are non plastic and with good wearing resistant thus can be safely used for road base and sub-base layers. Still more studies are need in order to reach South African specification
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